Electrical apparatus for transmitting and receiving signals.



1 A.' T. DAWs0'& GfucKHAM. BLBGTRIGAL APPARATUS Por; TBANSMITTING AND RECEIVING smNALs. Y Y AIPLIQATNNUIILBD npc. s1 1912. 1,098,617. Pai'ientedJune 2.1914.

4 sinus-SHEET 1.

A VA. T. DAWSON @L G. T. D1G'KH./M. DLDGTRIGALAPPARATUS PoR TRANsMTTING AND RECEIVING s'GNALs.

QAPPLIDATIDN FILED DBO. s1. 1912.

Patented J'un y2, 1914.

4 SHEETS-SHEET 2.`

ffii/M W/f fsw.'

A T. DAWSON TEG. T. BUGKHAM. ELECTRICAL dTPPARATUS FOR. TRANSMITTING AND RECEIVING SIGNLS.

APPLICATION FILED 1330.311 1912.

lPatent@ June 2,1914.

4 sEETs-SHBBT 3.

A.`T. DAWSG'N L G. T.J3UHE[AM` A vELBGTRIML APPARATUS FOR TRANSMITTING AND RECEIVING SIGNALS.

Y APPLIOATION PILHIADHO.31,1912.v

,Patented June 3, 1914.

` 4 SHEETS-SHEET 4.

STATES IPATENT OFFICE;

ARTHUR TREVOR DAWSON AND GEORGE THOMAS 'BUCKI-IAM, 0F WESTMINSTER LNDON, ENGLAND, ASSIGNORS T0 VICKERS LIMITED, OF WESTMINSTER, ENG- LAND.

ELECTRICAL APPARATUS FOR TRANSMITTING- AND RECEIVING- SIGNALS.

specification of Let-ters Patent.

Application filed December 31, 1912. Serial No. 739,440.

oeiving Signals7 of which the following is a specification.'

This inventionrelates to electrical ,apparatus for transmitting and receiving sigmais, and. has particular reference .to apparatns of the kind in which there is at ,the transmitting and the receiving station a switch and a step-by-step-motor, .each of which is adapted to actuate a pointer or .the like, the switch .at the transmitting station controlling the movements of the motor and its pointer at the receiving station and the switch at the receiving station controlling the motor and itspointer 4at the transmitt' stat-ion ccording to the present invention the step-by-step motors (which are preferably ofthe kind having-an odd number of pairs "of ield magnets and an arma-ture with an even number of pairs of pole-pieces) and the transmitting switches for use with the said motors, are `each adapted to displace an endless chain which carries the aforesaid pointer .or the like, this arrangement of motors and chains resulting in a considerable reduction in the dimensions of the apparatus; the said chains are preferably duplicated in order to give a more eiiicient sup- 1 port to the pointers.

, In order that the said invention may be clearly understood and readily carried into elect7 the same will be described more fully with reference to the accompanying drawin s in whichigure 1 is a front elevation showing a form of either the transmitting or the receiving apparatus constructed in accordance with the invention. Fig. 2 is a View similar to Fig. l with the front portion of the casing removed.- Fig. 3 is a section taken approximately on the line 3 3 of Fig. 2. Figs. i and .5' are -transverse 'sections taken respectively on the lines 4 t and 5 5 of Fig.

2 and viewed inthe direction of the arrows. 1 Fig. 6 is a more or less .diagrammatic view showing the electrical connections between the transmitting apparatus and the receiving apparatus.

In these figures A is the .casing of the apratentea June 2, 1914.

paratus, (which is assumed to be the transmittng apparatus).

B is the step-by-step motori, and B the pointer driven thereby.

C is the switch and' C the pointer driven mechanically by the handle which operates the switch. B", Bx. represent the .chains driven by the motor B and C", ,CX represent the chains driven byv the switch handle.

In the example illustrated the casing A has a glazed opening A1 through which is exhibited an engraved plate A2 graduated or marked in accordance with the signals or orders that are to be transmitted; for example in torpedoA control apparatus the graduations (as shown in Fig. l) indicate the number of degrees (to the right or left of a zero point) at which the Atorpedo tube is to be trained Aor to which the gyroscope of the torpedo is to be set. The two chains Cx operated by the switch C pass overdle pulleys 0X arranged near the upper and lower parts of the casing, the sprocket wheels c for actuating the chains being carried by a spindle c2 that is geared by means of pinions with the shaft C2 of the switch. They pointer C carried by the said chains CX is adapted to move in a rectilinear path over the engraved plate A2 and is preferably, as shown, in the form of a frame that surrounds the particular graduation or order to which it is set so as to render the said graduation or order readily distinguishable from the others. The chains BX operated by the moto-r B are also carriedby idle pulleys b* arranged near the upper andlower parts of the casing the said pulleys being directly actuated by sprocket wheels b on themotor shaft B2. i Y

The switch C is electrically connected with a step-by-step motor C3 operating a tell tale c3 in the form of a drum engraved with the orders that are marked on the plate A2. The said switch is also ,electrically connected with the step-by-step motor forming part of similar apparatus at the receiving station.

chanically :to indicate the order it is desiree.

to transmit. The tell tale c3 inthe transmitting apparatus is moved electrically to indicate the same order, a bell or gong E (Fig. 6) at the receiving station in electrical connection with the switch C is sounded, and the motor at this station is moved until the pointer driven thereby (corresponding to the pointer B at the transmitting station) reaches the order that has been transmitted. Vhen the operator at the receiving station, having had his attention attracted bythe sounding of the gong, has read the order, he

actuates the switch untillthe frame pointer' moved thereby (corresponding to the :trame pointer C) assumes a position opposite the motor driven pointer, and the tell tale (corresponding to the tell tale c3) indicates the order transmitted; at the same time the switch also actuates the motor B ,at the transmitting station until the pointer B moved thereby comes opposite the frame pointer C', thereby indicating to the operator at the transmitting station that the order has been received at the other station.

A Geneva stop D is'provided and is suitably geared with the switch C in order to prevent the latter from being angularly displaced to a greater extent than that necessitated by the number of orders to be transmitted. The switch may have three contact segments 0*, c, c' and a contact ring c7 (Fig. 2) each of which is adapted to bear against contacts c4", c5", c6* and c, of which the first three are connected to other contacts c,

co5, co (Fig. 6) while the contact c is con nected to the positive pole ot' the source of electric supply. The contacts c, 005, co0 are connected to the threepairs of field magnets of the step-byfstep motor at the transmitting station; a contact 007 (Fig. (i) is connected to the negative pole of the source of electric supply. The armature of the motor has two pairs of pole pieces. It is to be understood that the parts shown diagraininatically in Fig. 6 are (with the exception ot' the gong) duplicated, that is to say, the transmitting station (which is shown on the left-hand side of Fig. G) vis provided with a motor` B and the receiving station (which is shown oii the right-hani'l side ot' Fig. 6) is provided with a switch C and a tell-tale motor C3. This gong ll as is shown diagraminatically in Fig. (3 is connected to onekot the contacts c, en, co, ot lthe inotor and to the contact co7. ln thisI manner the gong will be sounded once during cach revolution of the switch at the transmitting station.

lVhat we claim and desire to securer by Letters Patent of the United States is l. lii electrical transmitting and receiving apparatus, the combination of a motoi and a switch `forming part of the transmitting apparatus, a similar motor and switch forming part of the receiving apparatus, means for electrically connecting the switch of each apparatus with the motor of 'the'l rocatory straight line movements, appertain' I ing to each apparatus, flexible means :tor drlving one device from its corresponding motor and another flexible meansv for drv- .ing the other device from its corresponding switch.

2. In electrical transmitting and receiving apparatus, the combination of a motor and` a switch forming part of the transmitting apparatus, a similar motor and switch forming part of the receiving apparatus, means for electrically connecting the Aswltch of each apparatus with the motor of the other apparatus the motor and switch being so constructed that movements of the switch result in proportional movements of the motor two pointers capable of reciprocating straight line movements, appertaining to each apparatus, flexible means for' driving one pointer from its corresponding motor, and another flexible means for driving the other pointer from its corresponding switch.

3. lin electrical transmitting and receiving apparatus, the combination of a motor and a switch forming part of the transmitting apparatus, a similar motor and switch torming part of the receiving apparatus, means for electrically connecting the switch of each apparatus with the motor of the other apparatus, the motor and switch being so constructed that movements of the switch result in proportional movements of the motor, a pointer capable of reciprocatory straight line movement, appertaining to each apparatus, a frame capable of reciprocatory straight line movement, appertaining to each apparatus, means for driving the pointer from its corresponding motor, and

means for driving the frame from its cor` responding switch.

4;. In electrical transmitting and receiving apparatus, the combination of'a motor and a switch forming part of the transmitting apparatus, a similar motor and switch forming part of the receiving apparatus, means for electrically connect-ing the switch of each apparatus with the motor of the other` apparatus, the motor and switch beine' so constructed that movements of the switch result in proportional movements of the motor, a pointer capable of reciprocatory straight line movement, appertaining to each apparatus, a frainecapable oi reciprocatory straight line movement appertaining to each apparatus, an endless chain.

for driving the pointer from its correspond ing motor, and another endless chain -for driving the frame from its correspondingr switch.l f

5. In electrical transmitting andpreceiw ing apparatus, the combination of a motor structed that movements of the switch reand a swiitch forming part of the transmitsult in proportional movements of the moting apparatus, a similar motor and switch tor, a pointer capable of reciprocatory forming part of the receiving apparatus, straight line movement, appertaining to each means for electrically connecting the switch apparatus, a frame capable of reciprocatory 7c of each apparatus with the motor of the straight line movement, appertaining to each other apparatus the motor and switch beapparatusPmeans for driving the pointer ing so constructed that movements of the from its corresponding motor, means for switch result in proportional movements of driving theframe from its corresponding the motor, a pointer capable of reciprocaswitch, a tell-tale, a motor for actuating said 75 i tory straightlline movement, appertaining tell-tale, and means for electrically connectto each apparatus, a frame capable of re- Ving the switch to said motor of the tell-tale. ciprocatory straight line movement, apper- 9. In electrical transmitting and receiving taining to each apparatus, two endless apparatus, the combination of a motor and chains for driving the pointer from its cora switch forming part ofthe transmitting 80 responding motor, and two endless chains apparatus, a similar motor and switch formfor driving the :trame from its corresponding part of the receiving apparatus, means j f ing switch. for electrically connecting the switch of each 6. In electrical transmitting and receiving apparatus with the motor ci the other apapparatus, the combination of a motor and paratus, the motor and switch being so con- 85 al SWitGh' forming pail? 'Of` ille tranSrnitting structed that movements of the switch result' apparatus, a similar motor and switch formin proportional movements of the motor, a

ing part of the receiving apparatus, means lpointer capable of reciprocatory straight for electrically connecting the switch of line movement, appertaining to each appaeach apparatus with the motor of the other ratus, a frame capable of reciprocatory 90 apparatus, the motor and switch being so straight line movement, appertaining to each constructed that movements of the switch apparatus, an endless chain for driving the result in proportional movements of the pointer from its correspondingjmotor,' anmotor, a pointer capable of reciprocatory other endless chain for driving the frame straight line movement, appertaining to from its corresponding switch, a, tellftale, a 95 each apparatus, a frame capable of recipiomotor for actuating said t'ell-tale'-7 and means i catory straight line movements, appei'tainfor electrically connecting the switch to said ing to each apparatus, two endless chains motor of the tell-tale.

for driving the pointer from its correspondl0. In electrical transmitting and receiv- Q5 ing motor, two endless chains for driving ing apparatus, the combination of a motor 100 the frame, from its corresponding Switch, and a switch forming part of the .transmitand a graduated transparent plate over ting apparatus, a similar motor and switch which said pointer and frame reciprocate. forming part of thereceiving apparatus,

` 7. In electrical transmitting and receiving means for electrically connecting the switch apparatus, the combination of a motor and of each apparatus with the motor of the 105 a switch forming part of the transmitting other apparatus the motor and'switch being apparatus, a similar motor and switch formso constructed tlc-'it movements of the switch ing part of the receiving apparatus, means result in proportional movements of the mofor electricallyl connecting the switch of tor, 'n pointer capable of reciprocatory 45 each apparatus with the motor of the other straight line movement, appertainiiig to each 110 apparatus, theY motor and switch being so apparatus, a frame capable oflreciprocatory constructed that movements of the switch Straight line movement, appertaining to each result in proportional movements of the apparatus, two endless chains for driving motor, two pointers capable of reciprocatory the pointer from its corresponding motor,

50 straight line movement-S, appertainingto two endless chains for driving the frame 115 each apparatus, a flexible means tor driving from its corresponding switch, a tell-tale, a one pointer vfrom its corresponding motor, motor for actuating said tell-tale, and means another flexible means fOr driving the Other for electrically connecting the switch to said pointer from its corresponding switch, a motor of the mtell-tale.

tell-tale, amotor for actuating said tell-tale, il. In electical transmitting and receiv- 120 and means for electrically connecting the ing apparatus, the combination of a motor switch to said inOtOI Of the tell-taleand a switch formingpart of the transmit- 8. 4In electrical transmitting and receiving ting apparatus, a similar motor and switch apparatus, the combination of a motor and forming part o f the.receiviilig apparatus,

6o a switch forming part of the transmitting means for electrically -connecting the switch 12b apparatus, a similar motor and switch fcrmot' cach apparatus with the motpr of the ing part of the receiving apparatus, means other apparatus, the motor and switch being for electrically connecting the switch of each so constructed that movements of the switch apparatus with the motor of the other apresult in proportional movements pf the moparatus,the motor and switch being so contor, a pointer capable of reciprocatory straight line movement, appertaining to each apparatus, a frame capable of reciprocatory straight line movement, appertaining to each apparatus, two endless chains for 'driving the pointer from its corresponding motora two endless chains for driving the frame from its corresponding switch, a graduated transparent plate over which said pointer and frame reciprocate, a tell-talc, a inotor forv actuatingsaid tell-tale, and means for electrically connecting the switch to said motor of the tell-tale.

In testimony whereof We affix our signatures in the presence of two Witnesses.

ARTHUR TREVOR DAWSON. GEORGE THOMAS BUCKHAM.

Witnesses HENRY KING, JNO. R. CASWELL. 

